I have added title and try different ways still getting 404 error once I press publish/update button also i have try on fresh install as well same error.
This usually happens if your .htaccess file got deleted or something went wrong with the rewrite rules. What you need to do is fix your permalinks settings.
Another quess. Probably your server uses some firewall wich has predefined rules and does not allow to load some words and urls and return 404 instead. You can check and configure it with CPanel if you have one.
Try next – go to Settings – Permalinks, choose post name and save settings. Note. If your server doesn’t allow write to .htaccess or file doesn’t exist – this will not help, you need to create this file manually
